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Run: 2026-09-10-01M25DK1ZNFT9A67ADK7GAN8P2
Run Details
Model:
DeepSeek V4.1 Flash (Reasoning, High)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
17.2s
Cost:
$0.002898
Provider:
DeepSeek
Evaluation summary
Score
Evaluator
Details Link
88.89%
Matches word count
(details)
Model input
User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 20 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
The heavy rain hammered the roof of Blackwood Manor as Detective Mara Voss stepped through the grand old front door. Inside, the air smelled faintly of copper, old candle wax, and something quite terrible that she could not ever name. Lord Ashcroft sat slumped in his velvet chair by the fireplace, a silver letter opener buried deep within his chest. His eyes were wide open, and his lips were parted as if he had once tried to speak to someone. An old grandfather clock ticked loudly behind her, marking each second as she studied the silent room for possible clues. The windows were locked tightly, the doors were bolted firmly, and no visible footprints marked the old dusty wooden floor. She knelt carefully beside the body, checking his pockets, and found a folded note clutched tightly in his right hand. The crumpled note read, "Meet me at midnight tonight, or the secret dark truth about us surely dies with you." Mara suddenly felt her pulse quicken because this was no ordinary murder, and the killer definitely remained still somewhere inside. Outside, sudden thunder cracked loudly, and hidden somewhere within Blackwood Manor, an old floorboard creaked under a single careful foot.
created_at
"2026-09-10T10:25:07.066Z"
9/10/2026, 10:25:07 AM
model
"deepseek/deepseek-v4.1-flash-20260910"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
455
moderation_latency
(null)
generation_time
17145
tokens_prompt
46
tokens_completion
4634
native_tokens_prompt
65
native_tokens_completion
4814
native_tokens_completion_images
(null)
native_tokens_reasoning
4573
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
num_fetches
(null)
web_search_engine
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"stop"
service_tier
(null)
usage
0.00289815
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer
(null)
request_id
"req-1789035907-etyMFxEQAQRcHHdWBqBG"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1789035907-GHUyP4FDDBoLMLFrUB7V"
upstream_id
"d752a41f-9997-4d3d-a9a0-21a9bdeae3dd"
provider_responses
0
endpoint_id
"fd104bc8-535a-4d31-a847-a8e402e86a02"
id
"d752a41f-9997-4d3d-a9a0-21a9bdeae3dd"
is_byok
false
latency
344
model_permaslug
"deepseek/deepseek-v4.1-flash-20260910"
provider_name
"DeepSeek"
status
200
total_cost
0.00289815
cache_discount
(null)
upstream_inference_cost
0
provider_name
"DeepSeek"
response_cache_source_id
(null)
data_region
"global"
workspace_id
"97e315e5-d303-487d-83c1-83180e8a13d4"
Evaluation details
Result
Evaluator
Details
Meta Data
88.89%
Matches word count
n/a
neededClean
false
sentences
9
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
40
8
20